What is the exam pattern and passing mark for GTU Control Systems (3131101)?

The GTU theory examination carries 70 total marks with a duration of 2.5 Hours. Minimum passing criteria is 23 marks (33%). The paper consists of 5 main questions with official marking breakdown and internal choices.

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The official GTU question paper PDF is linked directly from Gujarat Technological University's official examination archive. You can view the full paper online or download the original file.

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Gujarat Technological UniversitySummer 2026 examination

GTU 3131101 Control Systems Summer 2026 Question Paper & PDF

B.E. · EC Engineering · Semester 3 · Subject code 3131101

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Total: 70 marks
To pass: 23 marks (33%)
Duration: 2.5 Hours 2:30 PM – 5:00 PM
Questions: 5 with internal choice

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25 of 25 questions on this paper were also asked in other years. Each is marked below with the years it appeared.See all 31 repeated 3131101 questions, most asked first

Q.1

14 Marks

(a)

3 marksAsked in 4 of 4 papers

Explain standard test signals.

Also asked in Winter 2025 Q1a, Summer 2025 Q3a, Summer 2024 Q3b

(b)

4 marksAsked in 3 of 4 papers

Compare open loop and closed loop system with suitable examples.

Also asked in Summer 2025 Q5a OR, Summer 2024 Q1b

(c)

7 marksAsked in 4 of 4 papers

Explain any 7 rules of block diagram reduction technique.

Also asked in Winter 2025 Q1c, Summer 2025 Q4c OR, Summer 2024 Q2c OR

Q.2

14 Marks

(a)

3 marksAsked in 3 of 4 papers

Write advantages of state space approach over classical methods.

Also asked in Winter 2025 Q2a, Summer 2025 Q4a OR

(b)

4 marksAsked in 2 of 4 papers

Write properties of transfer function.

Also asked in Summer 2025 Q3b OR

(c)

7 marksAsked in 3 of 4 papers

Explain Mason’s Gain Formula with suitable example

Also asked in Winter 2025 Q2c, Summer 2025 Q5b

(c)

7 marksAsked in 2 of 4 papers

Write a short note on state space representation of a control system.

Also asked in Winter 2025 Q2c OR

Q.3

14 Marks

(a)

3 marksAsked in 2 of 4 papers

Explain in brief about PID controller.

Also asked in Winter 2025 Q3a

(b)

4 marksAsked in 4 of 4 papers

Explain force voltage analogy.

Also asked in Winter 2025 Q3b, Summer 2025 Q1b, Summer 2024 Q3c OR

(c)

7 marksAsked in 4 of 4 papers

Explain the steps of root locus

Also asked in Winter 2025 Q3c, Summer 2025 Q2c, Summer 2024 Q4c OR

(a)

3 marksAsked in 2 of 4 papers

Explain in brief about PD controller.

Also asked in Winter 2025 Q3a OR

(b)

4 marksAsked in 2 of 4 papers

Explain force current analogy.

Also asked in Winter 2025 Q3b OR

(c)

7 marksAsked in 3 of 4 papers

Explain the steps of Bode plot.

Also asked in Summer 2025 Q2b, Summer 2024 Q5b

Q.4

14 Marks

(a)

3 marksAsked in 2 of 4 papers

Find Laplace transform of x(t) = cos2t

Also asked in Winter 2025 Q4a

(b)

4 marksAsked in 2 of 4 papers

Explain Nyquist Stability Criteria.

Also asked in Summer 2025 Q4b

(c)

7 marksAsked in 3 of 4 papers

Explain Phase-Lag compensator in detail.

Also asked in Winter 2025 Q4c, Summer 2025 Q5c

(a)

3 marksAsked in 3 of 4 papers

Find Laplace transform of x(t) = sin2t

Also asked in Winter 2025 Q4a OR, Summer 2024 Q2b

(b)

4 marksAsked in 3 of 4 papers

Explain polar plot with suitable example.

Also asked in Winter 2025 Q4b OR, Summer 2025 Q4b OR

(c)

7 marksAsked in 3 of 4 papers

Explain Phase-Lead compensator in detail

Also asked in Winter 2025 Q4c OR, Summer 2025 Q5c OR

Q.5

14 Marks

(a)

3 marksAsked in 3 of 4 papers

Define

i)Marginally stable state

ii)Conditional stable state

iii)Unstable state.

Also asked in Summer 2025 Q4a, Summer 2024 Q5a

(b)

4 marksAsked in 4 of 4 papers

Define steady state error and obtain its formula

Also asked in Winter 2025 Q5b, Summer 2025 Q4c, Summer 2024 Q3b OR

(c)

7 marksAsked in 2 of 4 papers

Discuss unit step response of first order system.

Also asked in Winter 2025 Q5c

(a)

3 marksAsked in 4 of 4 papers

Define

i)Gain Margin

ii)Frequency response

iii)Phase Margin

Also asked in Winter 2025 Q5a OR, Summer 2025 Q5a, Summer 2024 Q5a OR

(b)

4 marksAsked in 2 of 4 papers

Obtain equation of peak time for a second order control system when subjected to unit step input.

Also asked in Winter 2025 Q5b OR

(c)

7 marksAsked in 2 of 4 papers

Discuss impulse response of second order system.

Also asked in Winter 2025 Q5c OR

More Control Systems papers

Questions repeat across sessions. Working through two or three papers shows you which topics GTU asks most.

Winter 202570 marks · 5 questions

Summer 202570 marks · 5 questions

Summer 202470 marks · 5 questions

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About this paper

Official Gujarat Technological University (GTU) examination paper for Control Systems (Summer 2026, B.E. · EC Engineering, Sem 3). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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